The First Army is a major formation of the United States Army. It was established during World War I and played a significant role in various military operations. The First Army is responsible for training and preparing soldiers for deployment, ensuring they are ready for combat situations. Throughout its history, the First Army has participated in numerous conflicts, including World War II and the Korean War. It has also been involved in humanitarian missions and disaster relief efforts. The First Army continues to adapt to modern warfare challenges while maintaining its core mission of readiness and support.